- Diogel
  Keep your Nostr identity in your hands, in your browser, on your phone, or on your own server.
- Nostrfi
  Nostr relay, storage, and backend-service infrastructure for builders and operators.
- Nostr Product Development
  Focused engineering support for teams building Nostr-native products, tools, and protocol-aware user experiences.
- Bitcoin Product Development
  Specialist engineering for Bitcoin-native and Bitcoin-aligned products with stronger ownership, payments, and digital sovereignty models.
- About
  Learn more about Threenine, our direction, and why we build in this space.
- Blog
  Practical Bitcoin, Nostr, and product engineering guides.

Bitcoin and Nostr software

Safer signing and dependable infrastructure for open protocols

Threenine builds product suites for Nostr identity safety, private-key protection, relays, storage, backend services, and practical Bitcoin and Nostr workflows.

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Why this matters

Open protocols only help when people can use and operate them without giving control away again.

Nostr and Bitcoin create different defaults for identity, publishing, payments, and infrastructure. Threenine focuses on the product work that makes those defaults practical: safer signing, clearer trust boundaries, and backend systems that operators can understand.

About Threenine View Products

Product focus

Nostr identity and signing workflows that keep private keys closer to the user.
Approval flows that make signing requests understandable before an event is produced.
Nostr relay, storage, and backend-service infrastructure for builders and operators.
Specialist engineering support for teams building aligned Bitcoin and Nostr products.

Diogel

Keep your Nostr identity in your hands.

Diogel keeps your digital identity safely in your hands, so no platform can take it from you. Porwr protects it in your browser, Symudol on your phone, and Bancwr on a server you run.

Porwr, in your browser

Use Nostr web apps that support NIP-07 without handing over your identity. For Chrome and Firefox.

Symudol, on your phone

Carry your Nostr identity on your phone, under your control. For Android.

Bancwr, on your own server

Keep your brand's Nostr identity under your control, on a server you run, with roles and a signing log. In development, with no stable release yet.

Yours, not ours

Porwr is open source and every Diogel repository is public. No analytics, and Diogel never holds your identity.

Diogel

Porwr, Symudol and Bancwr

Product details

Nostrfi

Relay and backend foundations for Nostr builders.

Nostrfi is the infrastructure pillar for relays, storage, backend services, and operator workflows. The public positioning is intentionally careful: foundations first, with hosted-service promises only when the product and operating model are ready.

Explore Nostrfi

Relay operations

Event storage, subscriptions, retention choices, policy, and moderation need clear operating boundaries.

Backend services

Nostr products need protocol-aware backend systems that can be monitored, documented, and maintained.

Observability

Operational visibility turns infrastructure from a hidden liability into a manageable product surface.

Operator clarity

Deployment choices, protocol assumptions, and reliability limits should be explicit before scaling.

Product suites

Practical product pillars for Bitcoin and Nostr.

Diogel and Nostrfi give the company strategy a clear shape: safer signing on one side, dependable infrastructure on the other.

Diogel

Diogel keeps your Nostr identity safely in your hands, so no platform can take it from you. Porwr protects it in your browser, Symudol on your phone, and Bancwr on a server you run.

Your identity. Your voice. No one's permission. Diogel is the threenine product suite that keeps your Nostr identity in your hands, in your browser with Porwr, on your phone with Symudol, and on your own server with Bancwr.

Nostrfi

Nostrfi is the threenine product suite for Nostr relay, storage, backend-service, and operator infrastructure.

Nostrfi is the threenine suite for Nostr infrastructure. It covers relay software, event storage, backend services, and the operator practices needed to run them dependably.

How to Choose Nostr Relays

Learn how to choose Nostr relays without guesswork. This guide covers privacy, reliability, search support, relay quality, and what to avoid.

Read the Full article 11 Apr 2026

"Choosing better Nostr relays improves reliability, discoverability, privacy, and the overall user experience. Here is a practical framework for making better relay choices."

nostr

Nostr Relays, Privacy, and Security

Understand the privacy and security trade-offs of Nostr relays, including what relay operators can observe, what they cannot do, and how to use relays more safely.

Read the Full article 11 Apr 2026

"Nostr relays improve decentralization and resilience, but they do not remove privacy and security trade-offs. Here is a practical guide to the risks and how to manage them."

nostr

What is a Nostr Relay?

Learn what a Nostr relay is, how relays work, and why they matter for privacy, censorship resistance, availability, and everyday use on Nostr.

Read the Full article 11 Apr 2026

"A practical guide to Nostr relays, including how they fit into the protocol, what they do for users, and why choosing relays carefully matters."

nostr

Why Nostr keys and identity are better for privacy

Nostr replaces account recovery, phone-number signups, and centrally managed identities with cryptographic keys. That changes privacy, but it also shifts responsibility onto the user.

Read the Full article 6 Apr 2026

"Nostr can be better for privacy because identity is based on keys instead of platform-owned accounts, but that does not make it automatically anonymous or risk-free."

nostr

Best Nostr Browser Extensions (2026): Complete Comparison

Compare the best Nostr browser extensions of 2026. We review Porwr by Diogel, Alby, Nos2x, and Nsec.app to help you choose the right NIP-07 signer for secure key management.

Read the Full article 24 Mar 2026

"A detailed comparison of the top NIP-07 browser extensions: Porwr by Diogel, Alby, Nos2x, and Nsec.app. Find the best Nostr signer for your needs."

Services

Product design & development

Threenine provides focused product design and development services for Nostr and Bitcoin protocol-based products and privacy-sensitive software.

Product engineering services

Nostr Product Engineering

Focused engineering support for teams building signers, browser extensions, relays, backend services, and protocol-aware product experiences.

Bitcoin Product Engineering

Bitcoin-native and Bitcoin-aligned product work shaped around payments, ownership, privacy, and user control.

Our Mission

We build owned products first, then support aligned teams where protocol constraints, trust boundaries, keys, relays, payments, and user control genuinely matter.